|
Records Committee review for rare bird sighting of Red-throated Loon at Red Rock Reservoir, 1992
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1992-11-07
|
1994-10-18
|
Rare birds documentation form
|
Records Committee review for a Red-throated Loon at Red Rock Reservoir, Marion County, IA on November 7, 1992. Includes a record review document with votes, an Iowa Bird Life article, and five documentation forms submitted to the committee.
|
Proescholdt, Mark
|
Red-throated Loon
|
Roberts Creek Park
|
Red Rock Reservoir - Roberts Creek area - (Marion Co.)
|
Large water area
|
The documentation form by Mark Proescholdt is the earliest and the one that forms the basis of this record. Other documentation forms by Diane Porter, Thomas H. Kent, Ray Cummins, and Jim Fuller. Other observers include Ann Barker, Ann Johnson, Matt Keene, Jim Sinclair, Tim Schantz, Harold White, Hank Zalatel, Beth Proescholdt, Loren Padelford, Diane Porter, David Youngblut, Tom Klein, Francis Moore, and Ray Cummins. | Elimination of similar species: The bill size and small size of the loon helps eliminate a Common Loon. A Pacific Loon would have a sharp contrast on the side of the neck between light and dark colors. | The original documentation form event lasted from 11:30:00/11:45:00 and 16:30:00/16:32:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
5
|
|
Rare bird documentation form for Pacific Loon at Red Rock Reservoir, 1998
|
Field notes Forms (documents)
|
Birds--Identification Ornithology Rare birds
|
1998-10-31
|
1998-11-01
|
Rare birds documentation form
|
Rare bird documentation form for a Red-throated Loon at Red Rock Reservoir in Marion County, IA on October 31, 1998.
|
Proescholdt, Mark
|
Pacific Loon
|
Red Rock Dam
|
Red Rock Reservoir - Marion County
|
Big reservoir just above the dam on north side
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. Other observers include Chuck Fuller. | Elimination of similar species: A Common Loon is bigger with a big bill, has light areas above and in front of eye, and a jagged heavily patterned side of the neck. Red-throated Loon has upturned bill mandibles and the division between dark and light on the neck is not nearly as defined as in a Pacific Loon. | The original documentation form event lasted from 14:45:00/15:16:00.
|
Iowa Ornithologists' Union | MS 166
|
32
|
9
|
|
Rare bird documentation form for Pacific Loon at Red Rock Reservoir, 1999
|
Field notes Forms (documents)
|
Birds--Identification Ornithology Rare birds
|
1999-11-06
|
1999-11-10
|
Rare birds documentation form
|
Rare bird documentation form for a Pacific Loon at Red Rock Reservoir in Marion County, IA on November 6, 1999.
|
Proescholdt, Mark
|
Pacific Loon
|
Whitebreast Recreation Area
|
Red Rock Reservoir - (Marion County) - Whitebreast Area
|
Large reservoir
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. Other observers include Beth Proescholdt and reported on the Birdline. | Elimination of similar species: Common Loons have massive bills, are much larger, and have a jagged look to their sides of the neck between dark and light colors. Red-throated Loons are paler in color and do not have that sharp dividing line on its neck but a more gradual merging of colors. | The original documentation form event lasted from 14:00:00/14:30:00 approximately.
|
Iowa Ornithologists' Union | MS 166
|
32
|
9
|
|
Rare bird documentation form for Black-backed Gull species at Red Rock Reservoir, 1998
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-12-25
|
1988-12-26
|
Rare birds documentation form
|
Rare bird documentation form for a Black-backed Gull species at Red Rock Reservoir in Marion County, IA on December 25, 1988.
|
Proescholdt, Mark
|
Gulls
|
Lake Red Rock
|
Red Rock Reservoir - (Marion County)
|
Whitebreast area east of the church - large open water
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. | Elimination of similar species: This was probably a Lesser Black-backed Gull or a Great Black-backed Gull. | The original documentation form event lasted from 15:00:00/15:00:30 approximately.
|
Iowa Ornithologists' Union | MS 166
|
34
|
36
|
|
Rare bird documentation form for Black-backed Gull species at Red Rock Reservoir, 1998
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1998-12-25
|
1998-12-26
|
Rare birds documentation form
|
Rare bird documentation form for a Black-backed Gull species at Red Rock Reservoir in Marion County, IA on December 25, 1998.
|
Proescholdt, Mark
|
Gulls
|
Lake Red Rock
|
Red Rock Reservoir - (Marion County)
|
Whitebreast area east of the church - large open water
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. | Elimination of similar species: This was probably a Lesser Black-backed Gull or a Great Black-backed Gull. | The original documentation form event lasted from 15:00:00/15:00:30.
|
Iowa Ornithologists' Union | MS 166
|
34
|
36
|
|
Records Committee review for rare bird sighting of Sabine's Gull near Whitebreast Park at Red Rock Reservoir, 1993
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-10-23
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for a Sabine's Gull near Whitebreast Park at Red Rock Reservoir in Marion County, IA on October 23, 1993. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Proescholdt, Mark
|
Sabine's Gull
|
Whitebreast Recreation Area
|
Red Rock Reservoir - (Marion Co.)
|
Large lake - near Whitebreast Area on South side
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. Other observers include Beth Proescholdt, Ann Johnson, Tim Schantz, Eugene Armstrong, Eloise Armstrong, Pam Allen, and Reid Allen. | Elimination of similar species: A Black-legged Kittiwake 1st winter bird is vaguely similar, but it does not have the three-triangle look on its wing and does not have a brownish back and neck | The original documentation form event lasted from approximately 09:45:00/09:50:00 and 10:15:00/10:18:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
9
|
|
Records Committee review for rare bird sighting of Laughing Gull at Red Rock Reservoir, 1991
|
Administrative records Clippings (information artifacts) Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-07-17
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for a Laughing Gull at Red Rock Reservoir in Marion County, IA on July 17, 1991. Includes a record review document with votes, an article in Iowa Bird Life, a photocopy of a photograph, and six documentation forms submitted to the committee.
|
Proescholdt, Mark
|
Laughing Gull
|
Lake Red Rock
|
Red Rock Reservoir - (Marion Co.)
|
Mudflats near retreating water
|
The documentation form by Mark Proescholdt forms the basis of this record. Other documentation forms by Ann Johnson, Jim Fuller, Tanya E. Bray, Barbara L. Wilson, and Randall Pinkston were submitted. Other observers include Ross Silcock, Tim Schantz, Eugene Armstrong, Eloise Armstrong, and many unidentified other observers. | Elimination of similar species: A Franklin's Gull juvenile or first-winter bird has a clear-cut blackish half-hood, a smaller bill, smaller size, and a white forehead. A juvenile Mew gull is much darker, has a thin bill, and light grayish legs. Juvenile Herring and California Gulls are much larger - larger than Ring-Billed Gulls - and lack the bright white at the base of the tail. | The original documentation form event lasted from approximately 09:00:00/09:15:00 and 11:00:00/12:10:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
18
|
|
Records Committee review for rare bird sighting of Iceland Gull at Red Rock Reservoir Dam, 1997
|
Administrative records Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1997-12-17
|
2000-11-24
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Red Rock Reservoir Dam in Marion County, IA on December 17, 1997. Includes a record review document with votes, a photograph, and three documentation forms submitted to the committee.
|
Proescholdt, Mark
|
Iceland Gull
|
Red Rock Dam
|
Red Rock Reservoir - (Marion Co.)
|
Below the dam - churning waters
|
The documentation form by Mark Proescholdt forms the basis of this record. Other documentation forms by Michael D. Overton and Stephen J. Dinsmore were submitted. Other observers include Kay Niyo, Curt Nelson, Jan Walter, Chris Wood, and Jim Sandrock. | Elimination of similar species: [...] We saw this gull twice in our viewing time and debated if it was an adult Kumlien's Iceland Gull or an adult Thayer's Gull. It was an adult Kumlien's Iceland Gull because a Thayer's Gull has much more blackish coloration at the primary tips and more dark coloration at the primary tips than the Kumlien's which has grayish markings on the primary tips and less dark-colored markings at the primary tips overall. Also, a Kumlien's Iceland Gull shows the almost white wing tips like we saw with a little grayish markings on some primary tips. | The original documentation form event lasted from approximately 15:00:00/16:15:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Magnificent Frigatebird at Red Rock Reservoir, 1988
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc Wildlife conservation
|
1988-10-03
|
1996-04-24
|
Rare birds documentation form
|
Records Committee review of a Magnificent Frigatebird at Red Rock Reservoir in Marion County, IA on October 3, 1988. Includes a record review document with votes, an article Iowa Bird Life, two pages from Iowa Birdlife by Gladys Black, internal correspondence on the sighting, and a documentation form submitted to the committee.
|
Youngblut, David
|
Magnificent Frigatebird
|
Lake Red Rock
|
Red Rock Reservoir
|
Lake
|
The documentation form by David Youngblut is the earliest and the one that forms the basis of this record. Other observers include Gladys Black. | The original documentation form event lasted from 17:00:00/17:30:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
15
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Red Rock Reservoir, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-03
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review of two Thayer's Gulls at Red Rock Reservoir in Marion County, IA on December 3, 1986. Includes a record review document with votes and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Lake Red Rock
|
Red Rock Reservoir
|
reservoir with ice and open water.
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Cal Knight, Bernie Knight, and Jim Fuller. | Elimination of similar species: Herring Gull --see above. [...] The bird is not any larger than some of the ring-bills--some of the ring-bills are smaller. The larger ring-bills are almost as big as this bird, and it is distinctly smaller than a number of Herring Gulls in the same field. The bill is much smaller and thinner; the head is small. [...] The striking thing about this bird is the size, bill shape and head shape compared to the nearby herrings and very distinct smudge through the eye." | The original documentation form event lasted from around 09:10:00 for several minutes and 15:55:00 for many minutes.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Rare bird documentation form for Black-legged Kittiwake at Red Rock Dam, 1990
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1990-12-24
|
1990-12-26
|
Rare birds documentation form
|
Rare bird documentation form for a Black-legged Kittiwake at Red Rock Dam in Marion County, IA on December 24, 1990.
|
Proescholdt, Mark
|
Black-legged Kittiwake
|
Red Rock Dam
|
Red Rock Reservoir
|
Below dam in the river channel
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. Other observers include Steve Dinsmore, Jim Dinsmore, Pam Allen, Reid Allen, Ann Johnson, Beth Proescholdt, Curt Nelson, Jan Walters, Pat Hanson, and Beth Brown. | Elimination of similar species: A Bonaparte's lacks the black bar across the back of the neck and the black stripes across the inner wings. | The original documentation form event lasted from 16:15:00/16:16:00 approximately.
|
Iowa Ornithologists' Union | MS 166
|
34
|
40
|
|
Rare bird documentation form for Black-legged Kittiwake at Red Rock Reservoir, 1990
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1990-12-28
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Black-legged Kittiwake at Red Rock Reservoir in Marion County, IA on December 28, 1990.
|
Porter, Diane C.
|
Black-legged Kittiwake
|
Lake Red Rock
|
Red Rock Reservoir
|
River
|
The documentation form by Diane Porter is the only one submitted and forms the basis of this record. Other observers include Ann Johnson and others. | Elimination of similar species: Most gulls don't have forked tails. Sabine's gull's mantle pattern is different, grey on inner part of wing and black only on outer part. Little gull doesn't have black legs and is very small.
|
Iowa Ornithologists' Union | MS 166
|
34
|
40
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Red Rock Reservoir, 1987
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1987-01-03
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Red Rock Reservoir in Marion County, IA on January 3, 1987. Includes a record review document with votes and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Lake Red Rock
|
Red Rock Res., Marion Co., Iowa
|
reservoir, partly frozen
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Tom Staudt, Steve Dinsmore, and unidentified other observers. | Elimination of similar species: The uniform coloration and lack of dark wing tips were the main marks used to separate it from Herring Gull. | The original documentation form event lasted from approximately 13:30:00/13:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Red Rock Dam, 1991
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-12-07
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Red Rock Dam in Marion County, IA on December 7, 1991. Includes a record review document with votes and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Red Rock Dam
|
Red Rock Res., Marion Co., IA
|
below dam on river
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include around twenty unidentified observers on IOU field trip. | Elimination of similar species: Much lighter and more uniform than 1st winter Herring Gulls flying in area. | The original documentation form event lasted from 08:00:00/09:00:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Pomarine Jaeger at Red Rock Reservoir, 1996
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1996-11-16
|
2000-11-22
|
Rare birds documentation form
|
Records Committee review for one to two Pomarine Jaegers at Red Rock Reservoir in Marion County, IA on November 16, 1996. Includes a record review document with votes, an article of Iowa Bird Life, and five documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Pomarine Jaeger
|
Lake Red Rock
|
Red Rock Res., Marion Co., IA
|
large lake
|
The documentation form by Stephen J. Dinsmore forms the basis of this record. Other documentation forms by Jim Fuller, Thomas H. Kent, Chris Edwards, and Ray Cummins were submitted. Other observers include Tom Johnson, Dennis Henrickson, Jim Sinclair, and many unidentified other observers. | Elimination of similar species: The size, shape, and white in the primaries ruled out all gull species. The combination of size, the large bill, large amount of white on the upperwing, white color in the underpirimary coverts, and blunt-tipped central rectrices rule out juvenile Long-tailed and Parasitic jaegers. | The original documentation form event lasted from 13:12:00/13:55:00 on November 16, 1996 and 15:40:00/16:30:00 on November 27, 1996.
|
Iowa Ornithologists' Union | MS 166
|
10
|
15
|
|
Records committee review for rare bird sighting of Thayer's Gull at Red Rock Reservoir, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-13
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for two to five Thayer's Gulls at Red Rock Reservoir in Marion County, IA on December 13, 1986. Includes a record review document with votes, a summary of the review, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Lake Red Rock
|
Red Rock Res., Marion Co.-below dam and near the Hwy 14 bridge
|
resting on sand bar below dam and feeding near open water on main lake
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Mark Proescholdt, Tom Kent, and Tom Staudt. | Elimination of similar species: The dark tail band and fairly dark body coloration should eliminate Iceland Gull. The smaller bill, rounder head, smaller size, more even body coloration, and pale undersides of the wings eliminates first-winter Herring Gull. | The original documentation form event occurred around 10:00:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Lesser Black-backed Gull at Red Rock Reservoir Dam, 1984
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1984-12-03
|
1993-09-01
|
Rare birds documentation form
|
Records Committee review for a Lesser Black-backed Gull at Red Rock Reservoir Dam in Marion County, IA on December 3, 1984. Includes a record review document with votes, an article in Iowa Bird Life, and nine documentation forms submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Lesser Black-backed Gull
|
Red Rock Dam
|
Red Rock Res., Marion Co. Iowa.
|
Des Moines River below Red Rock Reservoir dam.
|
The documentation form by Thomas H. Kent forms the basis of this record. Other documentation forms by Francis L. Moore, Robert K. Myers, Beth Proescholdt, Thomas J. Staudt, Peter C. Petersen, Dennis Thompson, Carl J. Bendorf, and Mark Proescholdt were submitted. Other observers include Hank Zaletel, Phyllis Harris, Gil Sandvick, Carol McMillen, Pauline Mairs, Gladys Black, Jim Fuller, Darwin Koenig, Eugene Armstrong, Eloise Armstrong, John Bowles, and other unidentified observers. | Elimination of similar species: Size and yellow legs exclude Great Black-backed, Western, and Slaty-backed Gulls. Size excludes Yellow-footed Gull. Mantle to [sic] dark for California Gull and leg color too yellow. | The original documentation form event lasted from 08:30:00/09:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
5
|
|
Records Committee review for rare bird sighting for Bullock's Oriole at Lake Red Rock, 1995
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1995-09-03
|
2000-11-20
|
Rare birds documentation form
|
Records Committee review for a Bullock's Oriole at Lake Red Rock in Marion County, IA on September 3, 1995. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Bullock's Oriole
|
Lake Red Rock
|
Red Rock Res., Marion Co.
|
forest along lake
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Another observer include Jim Sinclair. | Elimination of similar species: See above. Baltimore Oriole has a solid black hood and dark wings. | The original documentation form event lasted from 08:35:00/08:36:00.
|
Iowa Ornithologists' Union | MS 166
|
14
|
11
|
|
Records Committee review for rare bird sighting for Barrow's Goldeneye at Red Rock Reservoir, 1995
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1995-12-09
|
2000-11-20
|
Rare birds documentation form
|
Records Committee review for a Barrow's Goldeneye at Red Rock Reservoir in Marion County, IA on December 9, 1995. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Barrow's Goldeneye
|
Lake Red Rock
|
Red Rock Res., Marion Co.
|
large lake
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: Common Goldeneye eliminated by the shape of the white facial mark, head and bill shape, color of the upperparts, dark mark on the shoulder, and pattern of white on the scapulars. Note that numerous Common Goldeneye were available for direct comparison throughout the observation. | The original documentation form event lasted from 11:35:00/13:10:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
21
|
|
Records Committee review for rare bird sighting of a Thayer's Gull at Red Rock Reservoir Dam, 1985
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1985-12-10
|
1993-09-03
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Red Rock Reservoir Dam in Marion County, IA on December 10, 1985. Includes a record review document with votes, an article in Iowa Bird Life, and six documentation forms submitted to the committee.
|
Bendorf, Carl J.
|
Thayer's Gull
|
Red Rock Dam
|
Red Rock Res. Tailwater
|
|
The documentation form by Carl J. Bendorf forms the basis of this record. Other documentation forms by Thomas H. Kent, Francis L. Moore, Bob Myers, Beth Proescholdt and Mark Proescholdt, and Dennis Thompson were submitted. Other observers include Joe Schaufenbuel, Darwin Koenig, Steve Dinsmore, Eugene Armstrong, Eloise Armstrong, and many unidentified observers. | Elimination of similar species: Thayer's Gull is a difficult bird to identify. In researching this problem, I have found several helpful sources in addition to the standard field guides and I have tried to understand what it takes to know a Thayer's Gull when you see one. Nearly every reference makes it clear that Thayer's cannot be identified on the basis of one or two positive field marks. It takes a combination of characters to come to a conclusion of any certainty. In discussing this particular observation, I will examine each of the fieldmarks and compare and contrast to similar species with liberal reference to the literature, especially Lehman (1980). The most likely similar gulls in this case are 1st winter Herring and 1st winter Iceland (Kumlien's). The Kumlien's form is the darker form of the Iceland Gull and is the form that breeds in the Baffin Island area and winters mainly on the Atlantic coast. Lehman's article deals mainly with Kumlien's. Several similarly sized and possible but unlikely candidates can be eliminated rather quickly. A 1st winter California should not have an all dark bill and would show much darkening in the primaries in flight. Lesser Black-backed Gull could be about the right size, but in flight a 1st winter bird should show darker primary and secondary coverts, more extensively dark primaries, even compared to Herring Gull. A 1st summer Slaty-backed Gull is also light uniform brown with an all dark bill, but it should exhibit extensive darkening in the primaries on the upper wing. A 1st winter Glaucous-winged Gull would be very similar to Thayer's but should be larger, with a larger bill, and less mottling to the body color. Except for the first two, one would probably not consider the likelihood of their occurrence in Iowa to be very great. One hybrid, Glaucous-winged X Western, might be similar but should have a quite heavy bill. [...] Summary: Of the most likely similar species, 1st winter Herring Gull and 1st winter Kumlien's Iceland Gull, each is eliminated by one or more of the features discussed above. The wing pattern is especially damaging to the possibility of Herring, along with the bill shape and size. Iceland is ruled out by the presence of the noticeable tail band and by the darker secondaries on the upper wing. To identify a Thayer's Gull, one must see a combination of field marks. I feel that the bird I saw at Red Rock is consistent on every point.| The original documentation form event lasted from 14:15:00/14:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Rare bird documentation form for Barn Swallow at Red Rock Reservoir, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-11-13
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Barn Swallow at Red Rock Reservoir in Marion County, IA on November 13, 1987.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Barn Swallow
|
Lake Red Rock
|
Red Rock Res. #14 bridge, Marion Co. IA
|
Large Reservoir
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: Behavior and landing place clearly made it a swallow. Red on throat and forked tail, eliminate all other species. Only tree swallow would be likely at this date. Actually, I knew what the bird was as soon as I got my binoculars on it. | The original documentation form event lasted from 11:48:00/11:50:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
87
|
|
Rare bird documentation form for Northern Goshawk at Red Rock Reservoir, 1981
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1981-02-06
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Northern Goshawk at Red Rock Reservoir in Marion County, IA on February 6, 1981.
|
Thornburg, Robert E.
|
Northern Goshawk
|
Lake Red Rock
|
Red Rock Res. - south end of Robert's Creek Park
|
a very open area between a bay of Red Rock and Robert's Creek Lake - grass - 6-8" high
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The documentation form by Robert E. Thornburg is the only one submitted and forms the basis of this record. | Elimination of similar species: The size and head markings eliminated Cooper's and Sharp-shinned Hawks. Female Marsh Hawk by head and lack of Rump Patch (over). Imm. Red-tailed by the heavy streaks over the entire breast, the much longer tail and head markings. | The original documentation form event lasted from 09:30:00/09:40:00.
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Iowa Ornithologists' Union | MS 166
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33
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25
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Records Committee review for rare bird sighting of Iceland Gull at Red Rock Reservoir Dam, 1997
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1997-12-21
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2000-11-24
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Rare birds documentation form
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Records Committee review for an Iceland Gull at Red Rock Reservoir Dam in Marion County, IA on December 21, 1997. Includes a record review document with votes and a documentation form submitted to the committee.
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Kenne, Matthew C.
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Iceland Gull
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Red Rock Dam
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Red Rock Res, Marion Co.
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spillway below Red Rock Res.
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The documentation form by Matt Kenne is the only one submitted and forms the basis of this record. Other observers include Eugene Armstrong and Eloise Armstrong. | Elimination of similar species: Glaucous Gull larger with bicolored bill. Thayer's has noticeable tail band, overall color usually darker, and upper side of primaries darker, especially the tips. Secondary bar not present. | The original documentation form event occurred periodically from 08:00:00/11:00:00.
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Iowa Ornithologists' Union | MS 166
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11
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4
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Rare bird documentation form for Semipalmated Sandpiper at Red Rock Reservoir, 1987
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Field notes
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Birds--Identification Ornithology Rare birds
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1987-11-13
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N/A
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Rare birds documentation form
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Rare bird documentation form for sixteen Semipalmated Sandpipers at Red Rock Reservoir in Marion County, IA on November 13, 1987.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Semipalmated Sandpiper
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Lake Red Rock
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Red Rock Res, Marion Co, IA
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mud flats, large reservoir
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: I judged birds to be small peeps. Too small and gray to be Pectorals. Dunlin would be more likely, but bills not long enough or droopy + body too small. Did not have brown color on bill to suggest Least. Date would be second latest for Iowa. | The original documentation form event lasted from 10:50:00/11:45:00.
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Iowa Ornithologists' Union | MS 166
|
34
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17
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Records Committee review for rare bird sighting of Lesser Black-backed at Red Rock Lake, 1994
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1994-10-29
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1996-04-25
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Rare birds documentation form
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Records Committee review for a Lesser Black-backed Gull at Red Rock Lake in Marion County, IA on October 29, 1994. Includes a record review document with votes and a documentation form submitted to the committee.
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Armstrong, Eugene
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Lesser Black-backed Gull
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Lake Red Rock
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Red Rock Lake
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Lake
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The documentation form by Eugene Armstrong is the only one submitted and forms the basis of this record. Other observers include Eloise Armstrong, Cal Knight, Bernie Knight, Maridel Jackson, and Barb Bettis. | Elimination of similar species: Ringbills never have a scaly pattern over the back or an all black bill. Smaller than a herring gull. Herrings only have a black bill when they are in brown juvenile plumage. 1st summer herring has a 2/3rds pink bill. | The original documentation form event lasted from 11:15:00/11:35:00.
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Iowa Ornithologists' Union | MS 166
|
11
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5
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